All coherent field states entangle equally

All coherent field states entangle equally We analyze the interactions of particle detectors with coherent states of a free scalar field. We find that the eigenvalues of the postinteraction density matrices of i) a single detector, ii) two detectors, and iii) the partial transpose of the latter, are all independent of which coherent state the field was in. A consequence of these results is that a detector pair can harvest the same amount of entanglement from any coherent field state as from the vacuum. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

All coherent field states entangle equally

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All coherent field states entangle equally

Abstract

We analyze the interactions of particle detectors with coherent states of a free scalar field. We find that the eigenvalues of the postinteraction density matrices of i) a single detector, ii) two detectors, and iii) the partial transpose of the latter, are all independent of which coherent state the field was in. A consequence of these results is that a detector pair can harvest the same amount of entanglement from any coherent field state as from the vacuum.
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Publisher
The American Physical Society
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.96.025020
Publisher site
See Article on Publisher Site

Abstract

We analyze the interactions of particle detectors with coherent states of a free scalar field. We find that the eigenvalues of the postinteraction density matrices of i) a single detector, ii) two detectors, and iii) the partial transpose of the latter, are all independent of which coherent state the field was in. A consequence of these results is that a detector pair can harvest the same amount of entanglement from any coherent field state as from the vacuum.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jul 15, 2017

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